Harvester cut down trees by connecting through a forest, over 200 blocks away from the harvester. This caused frame rate issues, not to mention destroying the forest. Need to place a limit on the range of the harvester.

using MineFactoryReloaded-[1.7.10]2.8.0-104

The limit is in the config.

sorry, didn't realize. Maybe a good idea to change the default to a smaller value though.